How to change URL depending on subdomain?

Question

1C-Bitrix

Hello.
There is a site on Bitrix. The site has regional subdomains like spb.site.ru. Subdomains and dynamic information on them are configured through the vregions module. The task is to create landing pages for each subdomain of the city.site.ru/newpage-city.ru type.
It turns out there will be one page newpage. And now you need to add a city to it in the url. How to implement it correctly?

Answer 1

Through Multisite on different domains .
And how to create subdomains is another question.